I'm really surprised about the negative reactions to Heidi. I thought it was quite a popular name! I think both Adelaide and Heidi are lovely and its really nice to have a family connection to the name.

This is not my view (I like the name), but some people are not aware that Adelaide is historically a girls name, and think that it originated as a 'geographical' type name after the Australian city (which, in reality, was named after King William IV's wife).

I dislike Heidi as a stand-alone name, but think it is fine as a nickname.